According to Skobbler, 82,000 people have downloaded its sat nav app for the iPhone in just 4 weeks. Which indicates that Skobbler for Android is going to be extremely popular in the coming weeks and days too.A very big reason for that success is price, the turn-by-turn sat nav app being absolutely free to download and use, data charges permitting. But there's more to it than that. According to Marcus Thielking, co-founder of Skobbler: 'Developing Skobbler for the Android platform was the next logical step for the company. Our goal is to show that the revolutionary OpenStreetMap (OSM) concept can already support great location-based services, even in the most complex category which is definitely car navigation.''Developing our unique OSM-based apps for the most popular mobile platforms has always been part of our ongoing strategy. We are looking forward to the feedback of our Android customers and hope that they will embrace the idea of a nationwide (if not worldwide) collaborative mapping project just as much as iPhone users have done already. We look forward to seeing what we call, ‘the future of sat nav’ become a reality, making expensive GPS hardware and slow, costly map updates a thing of the past.'As Mr Thielking mentioned there, Skobbler uses community maps from OpenStreetMap (OSM), the Wikipedia of maps that already has over 250,000 users worldwide dedicated to updating and creating the most detailed free map of the world. As a result, all users benefit from consistently updated maps without paying for expensive and already out-of-date updates.The app also offers both visual and voice-guided navigation, 2.5D bird’s eye view graphics, day and night display modes, automatic continuation of navigation after incoming calls, a pedestrian mode, a take me home function, bookmarks for favourite destinations and default maps of the UK and Ireland.Yes, all of that - and all for free.